基于BaseAdapter 实现ListView

注意扩展BaseAdapter 需要重写以下四个方法

getCount();

getItem();

getItemId();

getView();

程序清单

package xiaocool.net.listviewtest;import android.graphics.Color;import android.os.Bundle;import android.support.v7.app.ActionBarActivity;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.LinearLayout;import android.widget.ListView;import android.widget.TextView;public class MainActivity extends ActionBarActivity {   private ListView list;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.listview2);        list=(ListView)this.findViewById(R.id.list1);        /*//定义一个数组        String arr[]={"校酷网络1","校酷网络2","校酷网络3","校酷网络4","校酷网络5"};        //将数组包装成ArrayAdapter        ArrayAdapter
     
       adapter=new ArrayAdapter
      
       (this,R.layout.array_item,R.id.textView,arr);        list.setAdapter(adapter);*/        BaseAdapter adapter=new BaseAdapter() {            //返回总的列表项数            @Override            public int getCount() {                return 20;            }            @Override            public Object getItem(int position) {                return null;            }          //返回列表项的id            @Override            public long getItemId(int position) {                return 0;            }           //返回每个具体item的样子            @Override            public View getView(int position, View convertView, ViewGroup parent) {               //创建一个LinearLayout，并向其中添加两个控件                LinearLayout layout=new LinearLayout(MainActivity.this);                layout.setOrientation(0);                ImageView p_w_picpathView=new ImageView(MainActivity.this);                p_w_picpathView.setImageResource(R.drawable.syudio);                TextView textView=new TextView(MainActivity.this);                textView.setText("第"+(position+1)+"项");                textView.setTextColor(Color.BLUE);                textView.setTextSize(20);                layout.addView(p_w_picpathView);                layout.addView(textView);                return layout;            }        };        list.setAdapter(adapter);    }}